The first checkbox is either on visible (V) or not visible, off (). The second checkbox has three states - reference (R), template (T), or off (). They should all toggle to the next state on each click. thats as i thought. it's a little better in a brand new scene (the objects change to their correct state, but the checkboxes dont change) there's obviously some bug. I'll have report it. I could reinstall but in true autodesk fashion, even finding my product key and serial no. was a nightmare. i'll just put it down to another annoyance it what, frankly, seems a pretty shoddy piece of software, given the price. I've barely scratched the surface and I've had problem after problem. :S